About Us

Located along the Ohio River on Pittsburgh’s Northside, the Allegheny County Sanitary Authority (ALCOSAN) provides wastewater treatment services to 83 communities including the City of Pittsburgh.  ALCOSAN’s 59-acre treatment plant is one of the largest wastewater treatment facilities in the Ohio River Valley, processing up to 250 million gallons of wastewater daily.

ALCOSAN was created in 1946 under the Pennsylvania Municipal Authorities Act and began treating wastewater in 1959.  Secondary (biological) treatment processes were added in 1972.  The Authority is governed by a seven-member Board of Directors – three appointed by the Mayor of the City of Pittsburgh, three appointed by the Allegheny County Chief Executive and one joint appointment.  An Executive Director reports to the Board.

ALCOSAN's Mission:  To provide cost effective, 
customer oriented and environmentally conscious
wastewater treatment that protects public health
and enhances the use of our natural resources

As a nonprofit agency, ALCOSAN is funded solely by user fees with capital funds raised through the sale of sewer revenue bonds.  There are 320,000 residential, commercial and industrial accounts representing a service population of 900,000.

An environmentally and technologically focused organization, ALCOSAN recently completed a $400 million capital improvement program which addressed odor control, treatment capacity, solids handling and wet weather planning.  We have now embarked on the largest public works project in the region’s history through $1 billion in engineering and construction projects to address combined sewer overflows.



Sewer Overflow Advisory key: Wet Weather overflows have ceased. Rivers, streams and creeks may still be impaired. For more information: http://www.alcosan.org/SewerOverflowAdvisories/SewerOverflowAdvisoryKeySOAK/tabid/114/Default.aspx

Customer Care at ALCOSAN, we believe it's our duty and privilege to protect, recover and reuse our most valuable resources for the benefit of our customers.

Consent Decree: To comply with provisions set forth in the Clean Water Act, ALCOSAN must meet a series of requirements for planning, design and construction, operation and permitting. For more information http://www.alcosan.org/WetWeatherIssues/ConsentDecree/tabid/63/Default.aspx

Watershed Education: Leave small leftovers of paint and solvents to dry rather than pouring them down the drain. Learn more http://www.alcosan.org/Portals/0/PDFs/WhatCanUDo_Brochure_bled.pdf

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3300 Preble Avenue
Pittsburgh, PA 15233
(412) 766-4810